Index-plate for calculating-machines.



J. GRABBE. l INDEX PLATE FOR UALGULATI'NG MACHINES. y

` APPLIOATIH FILED JLY 30. 1909. 941 ,77 4.

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Be it known that I, JULIUS Gnanina citizendt the-United States, residingat New Yorkfcity,tManhattan, county and State-of New York, havezinvented new and'x useful Improvements in Index Plates for4Galenlating-Machines, of which the. follow'it'ig is a specification. A

This invention relates to an improvedcalculating machine and moreparticularly to the index' plate slidably secured to the body of themachine and adapte for the display of the product figures. uch a plateis marked 15 in latent No. 897,659, granted to It. Rein, September1,1908, and the object of the invention is to' simplify the constructionof the plate and reduce its weight, so that it may be manipulated. withless effort.'

In the accompanying drawing: Figure 1 is a top view of the index plate;Fig.',2 a bottom view thereof; -I" ig. 3 affront view, and Figs. 4, 5and' (3 are cross sections on lines 'et-4; 5 5, andG-(S, Fig. 2,respectively.

The index plate 10 is provided at its back with a seriesof dependlngperforatedlugs 11 for the recept-ion of a hinge-rod 12, by which theplate is slidably secured to the machine frame 13. This frame isprovided with ai'est 14 which engages the bottom of plate 10 at. thefront thereofl and serves to sustain the plate in a horizontal position.llate 1() is made cinnparativelythin and 4is provided Iwith a row ofwindows 15 through which the product figures are adapted to bedisplayed. Each Window is "encompassed by a boss 1G inte al with anddepending from the bottom Ao platelO. The inner Wall of boss 16 is-ot`Haring shape converging fromtop to bot-tom, (Fig. (i),V while its outerwall is of circular shapev and mergesl into a` 4.bearing 17 which isalso-integral with the bottom of plate 10, Bearings17 receive the.arbors of dials 18! displaying the product figures, which are exposedthrough Windows 15, some of said dials, being indicated by dotted linesin Fig.l 2. It may here be stated that 'the operative mechanism'of themachine does not, form part of the'present invention, the latterrelating solely to the construction of the index plate and adjoiningdevices for sustaining said operative mechanism.

llat'e 10 has a depending integral rim or circumferential flange.composed of a front section 19, a rear section 20 and end sections` ySfiecication of Letters Patent. Application rled July 30, 1.909. SerialN0. 510,412.

Patent-ea Np'v. 3o,

rest on support 14, while rear section 20 .car-

, 21. Of these, front section 1'9liis adapted toll ries the lugs-11.From the top of platefln y extends at each end thereof an integralsegmental fingerfpiece 22, by means offwhich the plate may bemanipulated.

To the lower side of plate'lCt'is4 secured studs 23 a rail 24 which isspacedztherefrom- 4to accommodate dials 18 and coperating parts. Rail 24isprovided with a series of triangular projections 25 perforated as at26 for receiving the lower' ends of arbors carrying auxiliary dials274;the `upper ends of such arbo'rsV being receivedv within Perforations28 of plate 10.,'v Di'als'27.l are also mounted between plate 10"andrailand their figures 'are exposed througha row of windows 29 of the plate.`A `series'ofglongi-4 i tudinal slots 30, in rail 24ar'e adapted toreceiveguide vpins 31 of aslide32', yby means of which dials 18 arereturnedtotlieirgzero position.

Front rim. 19` is proviiilialflietweenvilin-` l dows 29 with a series ofstepped'projleetions 33 for accommodating l'auxiliaryas ide 34, by meansof which. dials-I 27 .aref-fre rated. Rim 19 is furtherprovidedxgwitlithesual nose' 35 by means of-whiclnfthe pla'4 Y andlocked in position duri-ng tho'oal tending at rightangletherefrm-.andfcast into front rim 19, as indicated. y

Within the upper face of`plate i 10 are' formed a air` of undercutlongitudinal. grooves 37,-

pointers 41, 42, that move along the win ows and serve to subdivide orseparatethe'digits 951'" of the numbrs exposed. 1 y

Icl'airru' f 1. KIn a calculating machine, 4a shdable mf extending alongrows of win# dows 15, 29;.Tespectively. Thesegroovesac- 'commodate'tapering slides 3940 c ar mg' dex` plate provided with a series ofwix'idovvs,y y

vfrom the bottom 'of said plate around sai windows and having'iaringinner'walls.

3. In acalculating machine, a slidable 1n dex plate provided with aseries of windows, y

a series of bosses depending from the bottomV of said plate around saidwindows,.and la 119 -lscircumferential rim ,extending around the iplateA* N Y.

L -ln acalclatin'g.iniacliineya sldable invdex plate provided with aseries of windows,

a Series of bosses depending fromvtlie bottom of said plate around saidwindows, a rail spaced from the lower side ofthe plate and havingtriangular projections, afld dials journaled in vsaid projections.

` 5, In a calculating machine, dex plate provided witlia'series ofwindows,

a series of bosses depending from'tlie bottoniW f: saidiplateI aroundsaid windows; 4afront flange also depending from tlie plate, steppedvprojections integral with .saidy flange', and -a dex plate providedwith-a series of-w'indows,

flange also" depending vfrom the plate,"perfo lirse'rie's of bOSSe'sdepending from the 'bottoni offsaxd'plate around*said'-wi11dows,'a rear;

a" slidable inrated lugs integral with said rim, and a,liinge-rodfengaging said 1ugs. v

`7.. In acalculating machine,` a' slidable i11-4 dex plate provided witha series of windows, a series of bosses depending from the bottom vofsaid plate around saidwilidows, a front flange alsofdepending from theplate, and a sett-ing nose having a laterally extending heel-which isembedded Within said flange. l

, 8. In a calculating machine, a slidable index plate prvided'witli aserieu of Windows,

va series of bosses depending from the bottom of said plate around saidwindows, and a 'pair offintegral linger-pieces projecting upjivardlyfrom t-le ends of the plate. l

Signed by me at New York city, (Manhatt'an'J N. '-Y., thisv 29th day yofJuly, 190%). J ULIUS GRABER. 'VVitnesses Y y

